gcc/testsuite/gcc.dg/cleanup-9.c

   1 /* { dg-do run { target i?86-*-linux* x86_64-*-linux* ia64-*-linux* alpha*-*-linux* powerpc*-*-linux* s390*-*-linux* sparc*-*-linux* mips*-*-linux* } } */
   2 /* { dg-options "-fexceptions -fnon-call-exceptions -O2" } */
   3 /* Verify that cleanups work with exception handling through realtime
   4    signal frames.  */
   5
   6 #include <unwind.h>
   7 #include <stdlib.h>
   8 #include <signal.h>
   9
  10 static _Unwind_Reason_Code
  11 force_unwind_stop (int version, _Unwind_Action actions,
  12                    _Unwind_Exception_Class exc_class,
  13                    struct _Unwind_Exception *exc_obj,
  14                    struct _Unwind_Context *context,
  15                    void *stop_parameter)
  16 {
  17   if (actions & _UA_END_OF_STACK)
  18     abort ();
  19   return _URC_NO_REASON;
  20 }
  21
  22 static void force_unwind ()
  23 {
  24   struct _Unwind_Exception *exc = malloc (sizeof (*exc));
  25   exc->exception_class = 0;
  26   exc->exception_cleanup = 0;
  27
  28 #ifndef __USING_SJLJ_EXCEPTIONS__
  29   _Unwind_ForcedUnwind (exc, force_unwind_stop, 0);
  30 #else
  31   _Unwind_SjLj_ForcedUnwind (exc, force_unwind_stop, 0);
  32 #endif
  33
  34   abort ();
  35 }
  36
  37 int count;
  38 char *null;
  39
  40 static void counter (void *p __attribute__((unused)))
  41 {
  42   ++count;
  43 }
  44
  45 static void handler (void *p __attribute__((unused)))
  46 {
  47   if (count != 2)
  48     abort ();
  49   exit (0);
  50 }
  51
  52 static int __attribute__((noinline)) fn5 ()
  53 {
  54   char dummy __attribute__((cleanup (counter)));
  55   force_unwind ();
  56   return 0;
  57 }
  58
  59 static void fn4 (int sig, siginfo_t *info, void *ctx)
  60 {
  61   char dummy __attribute__((cleanup (counter)));
  62   fn5 ();
  63   null = NULL;
  64 }
  65
  66 static void fn3 ()
  67 {
  68   abort ();
  69 }
  70
  71 static int __attribute__((noinline)) fn2 ()
  72 {
  73   *null = 0;
  74   fn3 ();
  75   return 0;
  76 }
  77
  78 static int __attribute__((noinline)) fn1 ()
  79 {
  80   struct sigaction s;
  81   sigemptyset (&s.sa_mask);
  82   s.sa_sigaction = fn4;
  83   s.sa_flags = SA_ONESHOT | SA_SIGINFO;
  84   sigaction (SIGSEGV, &s, NULL);
  85   fn2 ();
  86   return 0;
  87 }
  88
  89 static int __attribute__((noinline)) fn0 ()
  90 {
  91   char dummy __attribute__((cleanup (handler)));
  92   fn1 ();
  93   null = 0;
  94   return 0;
  95 }
  96
  97 int main()
  98 {
  99   fn0 ();
 100   abort ();
 101 }